|Location||Colombo, Western Province|
Colombo Racecourse was a harness racing course in Cinnamon Gardens, Colombo, Sri Lanka. In 2012 it was redeveloped as the Colombo Racecourse Sports Complex to become the first International Rugby Union ground in Sri Lanka to host all the national rugby union sides home macthes.
During the second world war, it was used as a temporary airfield 
The ground went through a major renovation in 2014 which included installation of floodlights, shopping complex and restaurants.
Officially opened for horse racing in 1893 after it was moved from the Colpitty Race Course, as one of the best in terms of design, facilities, and size in the East. In 1922 a totalisator was installed becoming the first race course in the East to have one.
The Colombo Turf Club was based here with its own pavilion and club house next to the grand stand.
In late 1941 World War II began in the East. After the fall of Singapore the Royal Navy's East Indies Station was moved to Colombo and then to Trincomalee. Admiral Sir Geoffrey Layton was appointed Commander-in-Chief, Ceylon with Air Vice Marshal John D'Albiac as air officer commanding, No. 222 Group RAF which was based in Ceylon. The order was given to construct an airfield at the Colombo Racecourse. D S Senanayake, Minister of Agriculture and Lands (later the 1st Prime Minister of Ceylon) was given the task of its construction. Consisting only of a single runway, station headquarters and the officers mess were set up in the bungalows in Cinnamon Gardens and was serviced by a newly established military hospital in the premises of Royal College Colombo.
Two squadrons of the Royal Air Force where based at the racecourse. They were No. 258 Squadron RAF with Hawker Hurricanes and No. 11 Squadron RAF with Bristol Blenheims. When the Easter Sunday Raid occurred the Japanese bombed the RAF units at RAF Ratmalana yet passed over the Racecourse Airstrip without knowing it existed. This allowed the Hurricanes of No. 11 Squadron to deploy and intercept the Japanese raiders.
Following the end of the war the airfield was dismantled, racecourse was reconverted to horse racing. This was greatly effected after gambling and betting was banned in the country in the late 1950s. This resulted in horse racing stopping completely in Colombo thereafter.
The Colombo Racecourse and the Colombo Turf Club and its grounds were taken over by the government and its large land extent was segmented and distributed to government entities. Southern parts went to the University of Colombo, the norther portion to the Department of National Archives while others to the Royal College Sports Complex, Bloomfield Cricket and Athletic Club and sporting bodies.
The Grand stand and the Colombo Turf Club building were neglected and used for different purposes. The Sri Lanka Army used it as a temporary garrison from time to time as well as the Sri Lanka Air Force used what was left racecourse grounds for landing transport helicopters.
Colombo Racecourse Sports Complex
In 2012, the Grand stand and the Colombo Turf Club building was renovated by the 6th Engineer Services Regiment and Central Engineering Consultancy Bureau. The remaining grounds were redeveloped into Sri Lanka's first international grade Rugby Union grounds.